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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: B3LYP/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3LYP/CEP-31G*
 hartrees
Energy at 0K-29.054159
Energy at 298.15K-29.062089
HF Energy-29.054159
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy49.778369
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at B3LYP/CEP-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3463 3344 5.39      
2 A1 3072 2967 52.23      
3 A1 1679 1621 42.48      
4 A1 1475 1425 0.16      
5 A1 1079 1042 37.61      
6 A1 856 826 0.33      
7 A1 442 427 5.54      
8 A2 3556 3434 0.00      
9 A2 1386 1338 0.00      
10 A2 1060 1024 0.00      
11 A2 262 253 0.00      
12 B1 3555 3433 2.08      
13 B1 3118 3011 41.25      
14 B1 1357 1310 0.49      
15 B1 835 807 0.48      
16 B1 389 376 117.21      
17 B2 3464 3345 0.08      
18 B2 1671 1613 4.05      
19 B2 1382 1335 24.68      
20 B2 1055 1019 101.33      
21 B2 782 755 416.73      

Unscaled Zero Point Vibrational Energy (zpe) 17968.2 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 17351.9 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at B3LYP/CEP-31G*
ABC
1.15936 0.29335 0.26605

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.559
N2 0.000 1.281 -0.185
N3 0.000 -1.281 -0.185
H4 0.889 0.000 1.213
H5 -0.889 0.000 1.213
H6 0.823 1.334 -0.796
H7 -0.823 1.334 -0.796
H8 -0.823 -1.334 -0.796
H9 0.823 -1.334 -0.796

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.48181.48181.10341.10342.07172.07172.07172.0717
N21.48182.56242.09442.09441.02591.02592.80862.8086
N31.48182.56242.09442.09442.80862.80861.02591.0259
H41.10342.09442.09441.77802.41202.95692.95692.4120
H51.10342.09442.09441.77802.95692.41202.41202.9569
H62.07171.02592.80862.41202.95691.64563.13452.6678
H72.07171.02592.80862.95692.41201.64562.66783.1345
H82.07172.80861.02592.95692.41203.13452.66781.6456
H92.07172.80861.02592.41202.95692.66783.13451.6456

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.083 C1 N2 H7 110.083
C1 N3 H8 110.083 C1 N3 H9 110.083
N2 C1 N3 119.680 N2 C1 H4 107.313
N2 C1 H5 107.313 N3 C1 H4 107.313
N3 C1 H5 107.313 H4 C1 H5 107.356
H6 N2 H7 106.653 H8 N3 H9 106.653
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.441      
2 N -0.458      
3 N -0.458      
4 H 0.185      
5 H 0.185      
6 H 0.247      
7 H 0.247      
8 H 0.247      
9 H 0.247      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -2.221 2.221
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.524 0.000 0.000
y 0.000 -26.863 0.000
z 0.000 0.000 -17.681
Traceless
 xyz
x 5.748 0.000 0.000
y 0.000 -9.761 0.000
z 0.000 0.000 4.013
Polar
3z2-r28.026
x2-y210.339
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.984 0.000 0.000
y 0.000 4.194 0.000
z 0.000 0.000 3.649


<r2> (average value of r2) Å2
<r2> 47.603
(<r2>)1/2 6.899